On Fri, Mar 22, 2019 at 6:14 AM Tomi Valkeinen <tomi.valkei...@ti.com> wrote: > > On 22/03/2019 05:28, Andrey Smirnov wrote: > > According to the datasheet tc358767 can transfer up to 16 bytes via > > its AUX channel, so the artificial limit of 8 apperas to be too > > low. However only up to 15-bytes seem to be actually supported and > > trying to use 16-byte transfers results in transfers failing > > sporadically (with bogus status in case of I2C transfers), so limit it > > to 15. > > 16 is the limit from the DP spec. I agree, 8 looks odd. > > 15 looks odd too, so I think it warrants a comment there in the code. >
Crap, was going to add that, but forgot. Will do in v2. > Does 15 byte transfers ever work? Or mostly works but sometimes fails? > 15 bytes transfers work every time (at least to extent I tested it). For 16 byte transfers it depends on the transfer type. AUX transfers work for a while but then fail (as tested by dd'ing AUX chardev). I2C transfers work intermittently and when they fail return completely bogus status. Thanks, Andrey Smirnov _______________________________________________ dri-devel mailing list dri-devel@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/dri-devel
